Third row of Pascal-(1,5,1) array A081580.

Terms

a(0) =1a(1) =13a(2) =61a(3) =145a(4) =265a(5) =421a(6) =613a(7) =841a(8) =1105a(9) =1405a(10) =1741a(11) =2113a(12) =2521a(13) =2965a(14) =3445a(15) =3961a(16) =4513a(17) =5101a(18) =5725a(19) =6385a(20) =7081a(21) =7813a(22) =8581a(23) =9385a(24) =10225a(25) =11101a(26) =12013a(27) =12961a(28) =13945a(29) =14965